can anyone recommend a panel radiator? the room size is 16sq m and has to be simple to operate. on/off switch and thermostat.
panel radiator
- Thread starter low drains drifter
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Depends on the room temperature you wish to achieve and the amount of heat losses. Heat losses are highest through windows. Are high through outside walls and zero through internal walls if the other side is at the same temperature.
A room that size heated to 20 degrees with 2 outside walls and 0 degrees outside would at a guess need around 5 kW of heating.
A room that size heated to 20 degrees with 2 outside walls and 0 degrees outside would at a guess need around 5 kW of heating.
This calculator from Dimplex gives you recommended power ratings for heaters (including panel ones). https://www.tlc-direct.co.uk/Technical/DataSheets/Dimplex/HDS_tables.pdf
I personally like Dimplex, although cheaper makes are available.
I personally like Dimplex, although cheaper makes are available.
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Efficiency equals speed. So the faster a heater can heat the room the more efficient it is and the quicker it stops giving out heat when turned off the more efficient it is. So a fan heater is far more efficient than a oil filled radiator because you need to switch on the oil filled radiator earlier than the fan heater.
Two exceptions are heat pumps and inferred heater, the latter heats bodies not the air so being aimed in the correct direction is also important. There is a little inferred heat off many of the panel heaters so they need to be seen to be at maximum efficiency. But as to windows and walls this gets complex where you have a mixture as with inferred you don't want the heat directed at a window and even directed at an outside wall could mean some loss of heat. So mounting under a window has some advantages as the heat is directed at an inside wall. However it is also likely to waste the convected heat as near the window.
So all things considered I would say select the largest you can fit and of a design that you fancy the looks of and fit were it suits you as in real terms it's swings and roundabouts what you gain due to one thing you lose due to another. Except for special locations for example the church only needs heating for an hour and doors are wide open as people come in and out so inferred is best for church but in the main just fit what looks nice and where it will fit. Over 3kW is hard to power so that is really the limit.
There is a case for small heaters as they don't switch on and off as much so tend to keep a room at a more even heat. But in the coldest of days a 1kW fan heater would keep my non winterised 16 foot caravan warm if left on a thermostat so 1kW should keep most house rooms warm as the insulation is far better, even a 500W would likely keep most rooms warm. The problem is how long it takes to warm the room and this is simple the bigger the heater the quicker it heats room so the more efficient it is. Thought is as soon as it starts heating the room energy is being lost, so less time it takes the less energy is used.
Two exceptions are heat pumps and inferred heater, the latter heats bodies not the air so being aimed in the correct direction is also important. There is a little inferred heat off many of the panel heaters so they need to be seen to be at maximum efficiency. But as to windows and walls this gets complex where you have a mixture as with inferred you don't want the heat directed at a window and even directed at an outside wall could mean some loss of heat. So mounting under a window has some advantages as the heat is directed at an inside wall. However it is also likely to waste the convected heat as near the window.
So all things considered I would say select the largest you can fit and of a design that you fancy the looks of and fit were it suits you as in real terms it's swings and roundabouts what you gain due to one thing you lose due to another. Except for special locations for example the church only needs heating for an hour and doors are wide open as people come in and out so inferred is best for church but in the main just fit what looks nice and where it will fit. Over 3kW is hard to power so that is really the limit.
There is a case for small heaters as they don't switch on and off as much so tend to keep a room at a more even heat. But in the coldest of days a 1kW fan heater would keep my non winterised 16 foot caravan warm if left on a thermostat so 1kW should keep most house rooms warm as the insulation is far better, even a 500W would likely keep most rooms warm. The problem is how long it takes to warm the room and this is simple the bigger the heater the quicker it heats room so the more efficient it is. Thought is as soon as it starts heating the room energy is being lost, so less time it takes the less energy is used.
Efficiency is nothing to do with speed. Efficiency is the ratio, as a percentage, of energy out to energy in. Electric heaters are almost 100% efficient as virtually all the electrical energy is converted to heat.
Yes an oiled filled heater takes longer to give out useful heat as the oil has to warm up but it continues to give out after switching off. Overall the output per kW hour is the same.
Yes an oiled filled heater takes longer to give out useful heat as the oil has to warm up but it continues to give out after switching off. Overall the output per kW hour is the same.
These are the radiators we are reoplacing. can anyone tell me the likely wattage of these?
You can't tell just like that. They probably have a rating plate on the back which will tell you. Failing that you could measure the resistance with a multimeter and calculate it. Watts equals 240 x 240 divided by resistance.
No more than 3000.
IIRC there is a rating plate on the lower right hand side, or at the bottom, where the flex cable goes in.
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